Year	Number
2009-01-01	1073928
2010-01-01	996397
2011-01-01	973603
2012-01-01	1142322
2013-01-01	1161032
2014-01-01	1224315
2015-01-01	1460162
2016-01-01	1605301
2017-01-01	1613503